| 摘要 |
The air is channelled into a cylindrical container (1), the wall of which, at least in that part exposed to solar radiation (5), consists of a material which is permeable to the rays (5) of the sun. The container (1) is partly embedded in the earth (11) and has, on the inner side of this part of the wall, a lower coating (4) consisting of heat-retaining and moisture-retaining material. That part of the container (1) exposed to solar radiation (5) has, on its inner side, an upper coating (4A) which promotes the condensation of the moisture in the air. In the case of air channelled in during the daytime, this air is heated up in the container (1), under the influence of solar radiation, as a result of which the moisture in the upper coating (4A) evaporates. In the case of air channelled in during the night, the moisture on the upper coating (4A) condenses and is either channelled away or is retained in the lower coating (4) and evaporates again during the daytime which follows. The moisture is channelled, as vapour, with the flowing air through a duct (13) to individual consumer points, e.g. the locations in the earth of individual plants, where some of the moisture condenses in each case because the earth temperature is lower than the temperature in the insulated area of the container (1). <IMAGE> |
